清江大龙潭水库区新生代以来地壳应力场特征

Features of the crustal stress field since the Cenozoic Era in Qingjiang Dalongtan reservoir area

根据震旦－第三纪地层中构造变形的实际观测及卫星影象解译资料，计算了清江大龙潭水库区新生代以来区域应力场的主应力方向。结果表明：主压应力为北东东向，主张应力为北北西向；现代构造应力场与新生代以来应力场基本一致；晚第三纪以来，该区构造应力场相对稳定和统一。

Based on the data of practical observation of tectonic deformation in the strata of Sinia- Tertiary period and satellite imagery interpretation, the orientations of maximum principal stress since the Cenozoic Era in Qinjiang Dalongtan reservoir area are calculated. The results show that the orientation of principal compressive stress and principal tensile stress are NEE and NNW respectively. The modern tectonic stress field is in keeping with that since cenozoic era. Thus, it is considered that the crustal stress field in the area investigated are relatively stable and uniform since Neogene.